Device for bending hair-springs.



L FONNESBECK & W. B. ENGLAND.

DEVICE FOR BENDING HAIR SPRINGS.

APPLICATION FILED NE 1, 19!? Patented J an. 1, 1918.

In ver-ziors .ZZForzrzesEem? W.B.Ergland Hitorneys UNITED STATES PATENT oEEioE.

LEON FONNESLBECK AND WALLACE B. ENGLAND, OF LOGAN, UTAH.

" Application filed June 1,

To all whom it may concern:

Be it known that we, LEON FONNESBECK and VALLACE B. ENGLAND, citizens of the United States, residing at Logan, in the county of Cache and State of Utah, have invented certain new and useful Improvements in Devices for Bending Hair-Springs, of which the following is a specification.

This invention relates to an improved watchmakers implement and more particularly to a device of the above described character for bending hair springs.

The invention has as its primary object to provide a device whereby the outer convolution of a hair spring may be reversely bent so that the free extremity of the said convolution will lie above the body of the spring in a plane parallel thereto.

The invention has as a further object to provide a device of the above described character which, after the hair spring has been initially bent, the device may be set so that when the spring is again bent in a reverse direction, the two bends in the spring .will be of equal angles.

The invention has as a still further object to provide a device of the above described character having a table for supporting the hair spring in such position that the outer convolution of the spring may be easily engaged between the coacti'ng jaws of the device and wherein when the said spring has been so engaged, the table may then be shifted to a position out of the way.

And the invention has as a still further object to provide, a device having jaws of improved construction for bending the spring.

Other and incidental objects will appear as the description proceeds and in the draw ings wherein we have illustrated the preferred embodiment of the invention and wherein similar reference characters designate corresponding parts throughout the several views:

Figure 1 is a side elevation of our improved device showing the outer convolution of a hair spring engaged between the jaws of the implement,

Fig. 2 is a transverse sectional view taken on the line 22 of Fig. 1 and showing the manner in which the table employed is adapted to support the hair spring with the outer convolution thereof disposed for engagement between the jaws of the device,

Fig. 3 is a fragmentary perspective View Specification of Letters Patent.

DEVICE FOR BENDING HAIR-SPRINGS.

Patented Jan. 1, 1918.

1917. Serial No. 172,219.

more particularly showing the construction of the jaws of the implement as well as the spring supporting table, the table being shown detached, and

Fig. 4 is a side elevation of a conventional type of hair spring showing the manner in which the outer convolution of the spring is bent by our improved device.

In carrying out the invention we employ I a suitable base or stand 10 preferably provided with legs 11. This base is formed with a central opening 12. Mounted upon the base is a body 13 provided with a horizontal block 14 suitably connected with the base to extend diametrically of the opening 12 therein and integral with the block 14 is an over-hanging extension 15. The free extremity of the extension 15 is formed to provide a bearing for a vertically arranged screw shaft 16 provided at its upper extremity with a milled head 17 so that the said shaft may be readily rotated. Swingingly connected with the body 18 at a point slightly above the block 14, is an arm 18 confronting the said block. The arm 18 is somewhat shorter than the block 14 and is provided at its outer extremity with lateral enlargements or flanges 19. Interposed between the block and the said arm is a Hat spring 20 rebent upon itself to seat against the upper face of the block and secured thereto by a screw 21 fitted through the block from the opening 12 in the base 10. As will be obvious, this spring will normally urge the arm 18 upwardly away from the block. Mounted upon the outer end of the block 14 is a fixed jaw 22 detachably connected with the said block by a screw or other suitable fastening device 23. The jaw 22 is cut away at its upper extremity to provide spaced terminals 24 in which are formed alined notches 25. Set into the outer end of the arm 18 is a movable jaw 26. This jaw is secured to the arm by rivets or other suitable fastening devices extending therethrough and at its outer extremity is formed with a reduced downwardly curved terminal 27 in which is formed a notch 28. The terminal 27 of the aw 26 is adapt-ed to be received between i neath the table is an arm 31 pivotally connected at its inner extremity to one side of the block 14 at a point slightly below the mounting of the arm 18 for swingingly supporting the table. The table 29 is adapted to receive a hair spring to be retained by the flange 30 of the table and formed in the table at a point centrally thereof is an opening 32 through which the spring may be easily ejected from the table. Extending from the opening 32 and opening through the periphery of the table is a radial slot 33 the outer extremity of which receives the fixed jaw 22 and in this connection, partieular attention is directed to the fact that when the table is in a horizontal position, as illustrated in Fig. 2 of the drawings, the notches 25 of the fixed jaw will project into the plane of the periphery of the table. Ad j ust-able through the block 14 of the body 13 to cooperate with the free extremity of the arm 18 is a set screw 34: arranged to engage the arm at the flanges 19 thereon and projecting at its lower extremity through the opening 12 in the base 10.

As previously intimated, the table 29 is formed to receive the spring to be operated upon and the said table is preferably of such circumference that the ordinary hair spring will engage by the outer convolution thereof with the flange 30 of the table. After the spring has been seated within the table, the table is moved to horizontal position when the outer convolution of the spring will be brought into the plane of the notches 25 in the fixed jaw 22 and will accordingly drop into the said notches. The screw shaft 16 is then operated to swing the arm 18 and engage the terminal 27 of the jaw 26 with the outer convolution of the spring at a point between the terminals 25 of the fixed jaw, the outer convolution of the spring, of course, being received within the notch 28 of the movable jaw. With the spring thus initially gripped between the jaws, the table 29 may be swung downwardly to a position out of the way when the screw shaft 16 is further operated to force the terminal 27 of the movable jaw downwardly between the terminals 24: of the fixed jaw for bending the outer convolution of the spring laterally in one direction with respect to the body of the spring, to the desired angle. The set screw 34 is then adjusted upwardly upon the block 14 to engage the arm 18. In Fig. 4 of the drawings, we have shown a conventional type of hair spring after being operated upon by our improved device and it will be seen that initial bending of the spring, as just above described, will deflect the outer convolution thereof into angular relation to the body of the spring, as shown at 35.

After the spring has been initially bent, the mo vable jaw 26 is released when the spring 1s turned over upon the table 29 and the outer convolution thereof again engaged within the notches 25 of the fixed jaw 22, as previously described, for again bending the outer convolution of the spring at a point slightly spaced from the first bend. To accomplish this result, the screw shaft 16 is operated to force the terminal 27 of the movable jaw down between the terminals of the fixed aw when the outer convolution of the spring will be deflected laterally in a direc tion opposite to the first deflection of the said convolution of the spring to form the second bend 36. Since the downward movement of the arm 18 will, when the second bend in the spring is made, be limited by the set screw 34, the angle of the second bend 36 will be exactly equal to the angle of the first bend 35 so that the free extremity of the outer convolution of the spring will, as illustrated in Fig. 4, lie over the body of the Q5 spring in a plane parallel thereto. A terminal curve in the spring is thus produced such as is necessary for the uniform motion of the hair spring as well as for the adjustment of the said spring to isochronism. Furthermore, since the two angles in the outer convolution of the spring are of exact equal degree the terminal convolution and the body of the spring will be in accurate parallelism which is also imperative for the uniform movement of the spring.

It will therefore be seen that we provide a particularly simple and efiicient construction for the purpose set forth and wherein the angles of the reverse bends may be easily 159 varied in degree while at the same time the angles of the bends in any one spring will always be the same.

Having thusdescribed the invention, what is claimed as new is:

1. A device of the character described including a body block, a fixed jaw carried thereby, a work supporting table connected with the block and shiftable to a position with the said j aw intersecting the line of the outer edge of the table, and a movable jaw supported to coact with the fixed jaw, the work supporting table being movable independently of said jaws.

2. A device of the character described ineluding a body block, a fixed jaw carried thereby and provided with spaced notches, a recessed work supporting table supported by the block and shiftable to a position receiving the said jaw within said recess with the said notches intersecting the line of the outer edge of the table, and a movable jaw supported to coact with the fixed jaw and shift able between the said notches.

3. A device of the character described ineluding a body block, a work supporting table swingingly connected thereto and provided at its outer edge with a flange, there being a slot formed in the table and opening through the said flange, a fixed jaw connected to said block, the table being shiftable to a position with the said jaw received within said slot to intersect the line of said flange, and a movable jaw mounted to cooperate with the fixed aw.

4. A device of the character described including a body block, an arm swingingly connected therewith, yieldable means interposed between the block and the said arm for normally urging the arm away from the block, said body block being formed with an over-hanging extension, a screw shaft adjustable upon said extension for shifting the arm toward the body block, a fixed aw carried by the block, a movable jaw carried by the said arm to cooperate with the fixed jaw, and a work supporting table connect-ed with the block and movable to a position with its outer edge disposed in a plane with the fixed 5. In a watchmakers implement for bending watch springs, the combination of a body member, a fixed jaw carried thereby, a 1novable jaw shiftable to coact with the fixed jaw, an arm swingingly supporting said movable jaw, and means adjustable upon the body member to engage directly with said arm for limiting the throw of the movable jaw toward the fixed jaw.

6. In a watchmakers implement for bending watch springs, the combination of a body member, spaced fixed jaw terminals carried thereby, a movable jaw shiftable between the said terminals, and means adjustable for limiting the movable jaw in its movement between the said terminals.

7. In a watchmakers implement for bending watch springs, the combination of a body member, a fixed jaw carried thereby, a movable jaw shiftable to coact with the fixed jaw, and a swinging work supporting table mounted to cooperate with the said fixed LEON FONNESBECK. WVALLACE B. ENGLAND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, D. C. 

